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Chapter17Ex-1 - Chapter 17 Examples Fixed Random and...

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Chapter 17 Examples: Fixed, Random, and Mixed-Effects Models 1. A researcher studied the sodium content in lager beer by selecting at random six brands from the large number of brands of U.S. and Canadian beers sold in a metropolitan area. The researcher then chose eight 12-ounce cans or bottles of each selected brand from retail outlets in the area and measured the sodium content (in milligrams) of each can or bottle. The observations are: Rows: Brand Columns: Can 1 2 3 4 5 6 7 8 1 24.4 22.6 23.8 22.0 24.5 22.3 25.0 24.5 2 10.2 12.1 10.3 10.2 9.9 11.2 12.0 9.5 3 19.2 19.4 19.8 19.0 19.6 18.3 20.0 19.4 4 17.4 18.1 16.7 18.3 17.6 17.5 18.0 16.4 5 13.4 15.0 14.1 13.1 14.9 15.0 13.4 14.8 6 21.3 20.2 20.7 20.8 20.1 18.8 21.1 20.3 2. A car manufacturer wished to study the effects of differences between drivers and between cars on gasoline consumption. Four drivers were selected at random; also five cars of the same model with manual transmissions were randomly selected from the assembly line. Each driver drove each car twice over a 40-mile course and the miles-per-gallon were recorded. The data are: Rows: Driver Columns: Car 1 2 3 4 5 1 25.3 28.9 24.8 28.4 27.1 25.2 30.0 25.1 27.9 26.6 2 33.6 36.7 31.7 35.6 33.7 32.9 36.5 31.9 35.0 33.9 3 27.7 30.7 26.9 29.7 29.2 28.5 30.4 26.3 30.2 28.9 4 29.2 32.4 27.7 31.8 30.3 29.3 32.4 28.9 30.7 29.9
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3. A physiologist studied the effects of three reagents on muscle tissue in dogs.
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